Portion of light fixture



FIG. 1 is a perspective view from below of a portion of light fixture in accordance with my design;

FIG. 2 is an enlarged perspective view from below of the portion of light fixture in accordance with my design;

FIG. 3 is a side elevation view of the portion of light fixture in accordance with my design; and,

FIG. 4 is a bottom plan view of the portion of light fixture in accordance with my design.

The broken lines showing environmental structure are for illustrative purposes and form no part of the claimed design. 

The ornamental design for a portion of light fixture, as shown and described. 